PHP高手请进，总是提示Notice: Undefined index: action in D:\WWW\upload\upload.php on line 2
<?phpif($_GET['action']=="save"){include_once('conn.php');include_once('uploadclass.p...
<?php
if ($_GET['action'] == "save"){
include_once('conn.php');
include_once('uploadclass.php');
$title=$_POST['title'];
$pic=$uploadfile;
if($title == "")
echo"<Script>window.alert('对不起！你输入的信息不完整!');history.back()</Script>";
$sql="insert into upload(title,pic) values('$title','$pic')";
$result=mysql_query($sql,$conn);
//echo"<Script>window.alert('信息添加成功');location.href='upload.php'</Script>";
}
?>
<html>
<head>
<title>文件上传实例</title>
</head>
<body>
<form method="post" action="?action=save" enctype="multipart/form-data">
<table border=0 cellspacing=0 cellpadding=0 align=center width="100%">
<tr>
<td width=55 height=20 align="center"> </td>
<td height="16">
<table width="48%" height="93" border="0" cellpadding="0" cellspacing="0">
<tr>
<td>标题：</td>
<td><input name="title" type="text" id="title"></td>
</tr>
<tr>
<td>文件： </td>
<td>
<label>
<input name="file" type="file" value="浏览" >
<input type="hidden" name="MAX_FILE_SIZE" value="2000000">
</label>
</td>
</tr>
<tr>
<td> </td>
<td><input type="submit" value="上 传" name="upload"></td>
</tr>
</table>
</td>
</tr>
</table>
</form>
</body>
</html> 展开
if ($_GET['action'] == "save"){
include_once('conn.php');
include_once('uploadclass.php');
$title=$_POST['title'];
$pic=$uploadfile;
if($title == "")
echo"<Script>window.alert('对不起！你输入的信息不完整!');history.back()</Script>";
$sql="insert into upload(title,pic) values('$title','$pic')";
$result=mysql_query($sql,$conn);
//echo"<Script>window.alert('信息添加成功');location.href='upload.php'</Script>";
}
?>
<html>
<head>
<title>文件上传实例</title>
</head>
<body>
<form method="post" action="?action=save" enctype="multipart/form-data">
<table border=0 cellspacing=0 cellpadding=0 align=center width="100%">
<tr>
<td width=55 height=20 align="center"> </td>
<td height="16">
<table width="48%" height="93" border="0" cellpadding="0" cellspacing="0">
<tr>
<td>标题：</td>
<td><input name="title" type="text" id="title"></td>
</tr>
<tr>
<td>文件： </td>
<td>
<label>
<input name="file" type="file" value="浏览" >
<input type="hidden" name="MAX_FILE_SIZE" value="2000000">
</label>
</td>
</tr>
<tr>
<td> </td>
<td><input type="submit" value="上 传" name="upload"></td>
</tr>
</table>
</td>
</tr>
</table>
</form>
</body>
</html> 展开
展开全部
if ($_GET['action'] == "save"){
// 修改成
if (isset($_GET['action']) && $_GET['action'] == "save"){
// 如果不想再出现此类错误，使用变量前应该检查变量是否存在
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